Clock.



No. 820,669. 'PATENTED MAY 15, 1906.

W. E. PORTER.

. CLOCK.

APPLICATION IILED SEPT. 11. 1905.

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UNITE STATES PATENT OFFICE,

WILSON E. PORTER, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO NEW HAVEN CLOCKCO., OF NEW HAVEN, CONNECTICUT, A CORPORATION.

CLOCK.

Specification of Letters Patent.

Patented May 15, 1906.

Application filed September 11, 1905. Serial No. 277,917.

To all whmn it may concern:

Be it known that I, WILSON E. PORTER, a citizen of the United States,residing at New Haven, in the county of New Haven and State ofConnecticut, have invented a new and useful Improvement in Clocks; and Ido hereby declare the following, when taken in connection with theaccompanying drawings and the figures of reference marked thereon, to bea full, clear, and exact description of the same, and which saiddrawings constitute part of this specification, and represent, 1n

Figure 1, a view in front elevation of a clock-movement constructed inaccordance with my inventionwith the front movementplate removed; Fig.2, a plan view thereof; Fig. 3, an enlarged broken view of the movementin horizontal section on the line a, b of Fig. 1..

My invention relates to an improvement in that class of clock-movementsin which the mainspringarbor is concentric with the center arbor, theobject being to simplify movements of the character described.

With these ends in view my invention consists in a clock-movement havingcertain details of construction and combinations of parts, as will behereinafter described, and pointed out in the claim.

In carrying out my invention as herein shown I employ a mainspring-arbor2, having a central longitudinal passage the rear end 3 of which issquared for the reception of a winding-key. The rear end of the arbor isreduced in diameter to form a trunnion 4, which runs in a hole 5 in therear movementplate 6, the lengthwise movement of the arbor rearwardbeing prevented by a shoulder 7 at the base of the trunnion 4. At itsforward end the arbor 2 is provided with an integral ratchet-wheel 8,the teeth of which are engaged by a pawl 9, operated by a spring 10 andpivoted upon the front face of the main wheel 11, which turns upon abearingshoulder 12, formed upon the forward end of the arbor 2 at apoint directly to the rear of the integral ratchet-wheel 8, the mainwheel 11 being interposed between the rear face of the ratchet-wheel 8and a ring-like springwasher 13, which is mounted upon a shoulder 14,formed upon the arbor 2 at a point directly in the rear of thebearing-shoulder 12 and is smaller in diameter than the same. At

its extreme forward end the arbor 2 is formed 5 5 with a trunnion 15,turning in a hole 16 in the intermediate movement-plate 17. A shoulder18, formed betweenthe base of the trunnion 15 and the ratchet-wheel 8,reduces the friction between the forward end of the arbor 2 and the rearface of the plate 17 The trunnion 15 is formed with a small centralbearing-opening 19 for the reception and bearing of the inner end of thecenter arbor 20, the forward end of which has bearing in the frontmovement-plate 21, whereby the rear end of the center arbor is journaleddirectly in the forward end of the mainspringarbor. A flange 22 upon theinner end of the center arbor 2O bears upon the flat front face of thetrunnion 15 and holds the center wheel 23 from engaging with the frontface of the intermediate plate 17, the said center wheel being mountedupon the center pinion 24, which is frictionally coupled with the 7 5center arbor 20 by means of a coiled spring 25 and a collet 26. The rearend of the center arbor 20 projects rearward into the central opening 3of the arbor 2 for engagement by a handset inserted from the rear intothe arbor 8o 2 for setting the hands. The main wheel 11 meshes into themain pinion 27, which is mounted upon a shaft 28, through which movementis communicated to the center pinion 24 in any approved manner, notnecessary to describe or illustrate, as it forms no part of the presentinvention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In a clock movement, the combination with front, rear and intermediatemovementplates, of a center arbor journaled at its front end in the saidfront movement-plate, a mainspringarbor arranged concentrically with thesaid center arbor and having its rear end journaled in the said rearmovement-plate and its forward end formed with a trunnion journaled inthe said intermediate movement-plate, the said trunnion being formed I00ing the mainspring.

with a bearing-opening for the reception of In testimony whereof I havesigned this the rear end of the said center arbor which is specificationin. the presence of two subscribthus j ournaled directly in the said.1naining Witnesses. spring-arbor which has a longitudinal passage to thecenter arbor for setting the hands Witnesses: and Which is adapted to berotated for wind CLARA L. l/VEED,

I GEORGE D. SEYMOUR.

"WILSON E. PORTER.

